Sharp LC-32LE700E Service Manual page 47

<POWER BLOCK: 40/46/52 inch models>
No power supply (Front LED does not light up) and no power-up even if turned on (Front LED light up).
Is the wire harness in the unit properly connected?
Are F7001 and F7002 normal?
Is F7102 normal?
Is BU+5V supplied from pin(11) of connector CN7501 when the
power switch is turned off?
Is the PS_ON signal sent to pin(10) of connector CN7501 when
the power switch is turned on?
Is the AC_DET signal sent to pin(9) of connector CN7501 when
the power switch is turned on?
Is a DC voltage of approx. 400V applied to both ends of C7144?
Is UR13V supplied from pins(1-4) of connector CN7501 when the
power switch is turned on?
Is PNL12V supplied from pins(1-2) of connector CN7503 when
the power switch is turned on?
<40 inch models>
Is VLED supplied to pins(1-5) of CN7606 and pins(1-5) of
CN7607 when the power switch is turned on?
<46/52 inch models>
Is VLED supplied to pins(1-5) of CN7606, pins(1-5) of
CN7607,pins(1-3) of CN7608 when the power switch is turned
on?
LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO Reconnect and recheck the wire harness.
NO <40 inch models>
Are L7001, L7002, L7003, D7101, D7103, VA7002, VA7001,
VA7003 etc... faulty?
Check if the peripheral circuits are short-circuited.
<46 inch models>
Are L7001, L7002, L7003, L7004, D7101, VA7002, VA7001,
VA7003 etc... faulty?
Check if the peripheral circuits are short-circuited.
NO Are TH7102, C7130, etc... faulty?
NO Check the peripheral circuits (IC7102, T7101, C7510, PC7102,
PC7101, etc ⋅ ⋅ ⋅)
NO Check pin(59) of IC2002(UCON) on MAIN PWB.
NO Check the peripheral circuits such as PS_ON circuits of Q7503,
PC7103, Q7118, Q7114 and PC7104,Q7501,Q7502.
NO <40 inch models>
Does the PFC circuit normally work?
(Check IC7104, L7105, TH7101, RL7101, IC7200, Q7109,
Q7110 etc... and the peripheral circuits.)
<46/52 inch models>
Does the PFC circuit normally work?
(Check IC7104, L7105, TH7101, RL7101, IC7101, Q7108,
Q7109 etc... and the peripheral circuits.)
NO Check the peripheral circuits (T7102, D7507, C7514,7515,7516,
PC7105, PC7106, IC7503etc...)
Check the peripheral circuits (IC7502, etc ⋅ ⋅ ⋅)
NO
NO <40 inch models>
Check the peripheral circuits, T7102, D7516, D7517, C7528,
L7501etc ⋅ ⋅ ⋅.
NO <46/52 inch models>
Check the peripheral circuits, T7102, D7516, D7517, D7518,
C7528, C7538, L7501etc ⋅ ⋅ ⋅.
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